Tumoral calcium pyrophosphate dihydrate deposition disease with bone destruction in the shoulder. CT and MR findings in two cases.

We report on specific CT and MR features in two cases of tumoral calcium pyrophosphate dihydrate deposition disease in the shoulder with unusually large tumors. CT revealed features that were specific to the disease. MR was useful for detecting the extent of the mass and for obtaining information on adjacent soft-tissue and bone-marrow changes.